I don't know if that's an issue with myself or Pkhex, but whenever I try to find a new PID with Pokegen and consequently modify the Lickitung, Pkhex indicates that the Pokémon is invalid because of a Encounter Type PID Mismatch. I just want it to have 0 IV in Atk with a Calm Nature and the Oblivious ability, but I can't seem to get it done.
Well I don't really know if that's the right place to complain about it though.
EDIT : A friend did it for me. It's okay now.